About: Nonlinear Wave Modulation and Time Reversal Tomography of Structural Defects

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Classical ultrasonic tomography generally uses source signals of constant amplitude. Linear characteristics like amplitude attenuation or time of flight of elastic waves traversing a body in different directions are evaluated and used to localization and imaging of relatively large structural defects. The main advantage of nonlinear methods is their high sensitivity and ability to disclose defects smaller than ultrasound wavelength. Some limitations are connected with difficulties of defects location. To overcome these constraints, further modifications of NEWS, referred as nonlinear tomography procedures, are discussed in this paper. Two NEWS techniques are considered: Nonlinear wave modulation (NWMS) and nonlinear time reversal (NLTR), both using transducer arrays, allowing localization of damaged zones. Extracted nonlinear parameters are dependent on the wave paths along damaged zones, which allows zonal imaging of defects. Classical ultrasonic tomography generally uses source signals of constant amplitude. Linear characteristics like amplitude attenuation or time of flight of elastic waves traversing a body in different directions are evaluated and used to localization and imaging of relatively large structural defects. The main advantage of nonlinear methods is their high sensitivity and ability to disclose defects smaller than ultrasound wavelength. Some limitations are connected with difficulties of defects location. To overcome these constraints, further modifications of NEWS, referred as nonlinear tomography procedures, are discussed in this paper. Two NEWS techniques are considered: Nonlinear wave modulation (NWMS) and nonlinear time reversal (NLTR), both using transducer arrays, allowing localization of damaged zones. Extracted nonlinear parameters are dependent on the wave paths along damaged zones, which allows zonal imaging of defects. (en)
Title	Nonlinear Wave Modulation and Time Reversal Tomography of Structural Defects Nonlinear Wave Modulation and Time Reversal Tomography of Structural Defects (en)
skos:prefLabel	Nonlinear Wave Modulation and Time Reversal Tomography of Structural Defects Nonlinear Wave Modulation and Time Reversal Tomography of Structural Defects (en)
skos:notation	RIV/61388998:_____/09:00334340!RIV10-AV0-61388998
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(FR-TI1/274), P(GA106/07/1393), Z(AV0Z20760514)
http://linked.open...iv/cisloPeriodika	3
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Převorovský, Zdeněk Vejvodová, Šárka
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav termomechaniky AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	329725
http://linked.open...ai/riv/idVysledku	RIV/61388998:_____/09:00334340
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	time reversal tomography; ultrasonic imaging of defects; nonlinear elastic wave spectroscopy; nonlinear wave modulation (en)
http://linked.open.../riv/klicoveSlovo	nonlinear elastic wave spectroscopy nonlinear wave modulation time reversal tomography ultrasonic imaging of defects
http://linked.open...odStatuVydavatele	CZ - Česká republika
http://linked.open...ontrolniKodProRIV	[F69E38744D26]
http://linked.open...i/riv/nazevZdroje	NDT Welding Bulletin
http://linked.open...in/vavai/riv/obor	BI
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	*Evaluation of SHM methods and its integration into aircraft maintenance system Nonlinear ultrasonic spectroscopy of magnesium metallic composits and alloys
http://linked.open...UplatneniVysledku	2009
http://linked.open...v/svazekPeriodika	19
http://linked.open...iv/tvurceVysledku	Převorovský, Zdeněk Dos Santos, S. Vejvodová, Šárka
http://linked.open...n/vavai/riv/zamer	Complex dynamical systems in thermodynamics, fluid and solid mechanics
issn	1213-3825
number of pages	5 (xsd:int)
is http://linked.open...avai/riv/vysledek of	Nonlinear Wave Modulation and Time Reversal Tomography of Structural Defects Nonlinear Wave Modulation and Time Reversal Tomography of Structural Defects Nonlinear Wave Modulation and Time Reversal Tomography of Structural Defects Nonlinear Wave Modulation and Time Reversal Tomography of Structural Defects

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